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Chemical Identification
Common Name
Diclomezine
中文通用名
哒菌酮
IUPAC
6-(3,5-dichlorophenyl-p-tolyl)pyridazin-3(2H)-one
CAS
6-(3,5-dichloro-4-methylphenyl)-3(2H)-pyridazinone
CAS No.
62865-36-5
Molecular Formula
C11H8Cl2N2O
Molecular Structure
Physical Properties
Molecular weight:255.1; Physical form:Colourless crystals. Melting point:250.5-253.5 °C; Vapour pressure:<1.3×10-2 mPa (60 °C); Solubility:In water 0.74 mg/l (25 °C). In methanol 2.0, acetone 3.4 (both in g/l, 23 °C). Stability:Slowly decomposed by sunlight. Stable under acidic, neutral, and alkaline conditions.
Toxicology
Oral:Acute oral LD50 for rats >12 000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >5000 mg/ kg; not a skin irritant. Inhalation: LC50 (4 h) for rats 0.821 mg/l.
Environmental Profile
Ecotoxicology: 
Bees: LD50 (oral and contact) for honeybees >100 µg/bee.Birds:Dietary LC50 for bobwhite quail and mallard ducks >7000 ppm. Dietary LD50 for bobwhite quail >3000 mg/kg.Daphnia:50 (5 h) >300 mg/l.Fish: LC50 (48 h) for carp >300 mg/l. 
Environmental fate: 
Soil:Readily adsorbed on soil particles.
WATER SOLUBILITY: 0.74 mg/l at 25° C
Transport Information
Signal Word:CAUTION; Hazard Class:III (Slightly hazardous).

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